| Title |
Evaluation of SBBR Process Performance Focused on Nitrogen Removal with External Carbon Addition |
| Authors |
한혜정 ( Hye Jeong Han ) ; 윤주환 ( Zu Whan Yun ) |
| Keywords |
Biofilm; Enhanced biological phosphorus removal; EBPR; Nitrogen removal; Sequencing batch reactor; SBR; Specific oxygen uptake rate; SOUR |
| Abstract |
A sequencing batch biofilm reactor (SBBR) operated with a cycle of anaerobic - aerobic - anoxic - aerobic has been evaluated for the nutrient removal characteristics. The sponge-like moving media was filled to about 10% of reactor volume. The sewage was the major substrate while external synthetic carbon substrate was added to the anoxic stage to enhance the nitrogen removal. The operational results indicated that maximum T-N and T-P removal efficiencies were 97% and 94%, respectively were achieved, while COD removal of 92%. The observations of significant nitrogen removal in the first aerobic stage indicated that nitrogen removal behaviour in this SBBR was different to conventional SBR. Although the reasons for aerobic nitrogen removal has speculated to either simultaneous nitrification and denitrification or anoxic denitrification inside of the media, further researches are required to confirm the observation. The specific oxygen uptake rate (SOUR) test with biofilm and suspended growth sludge indicated that biofilm in SBBR played a major role to remove substrates. |